帷幕灌浆单耗量设计与施工差别较大的原因分析与处理措施

The reason analysis and treatment measures of the big difference between design and construction of curtain grouting per consumption

摘要

水利水电工程帷幕灌浆施工时的单耗量与设计单耗量相差较大，一般增大的情况较多。其增大的原因多种多样，也复杂可变，总的概括起来受灌浆材料、人为因素、灌浆压力和受灌地层岩性等等因素控制，但均可以采用有效的手段使其得到有效的控制。在历年来的规范修订过程也强调了这一点，每次修订过程中也对影响单耗量的参数进行了逐一修订，每一次修订的结果越来越符合工程实际和易于操作和实施。造成单耗量相差较大的因素也是影响帷幕灌浆单耗量增大的因素，可通过有效的控制手段和处理措施使其设计单耗量与施工时的单耗量基本一致，免得材料的增加带来工程造价的增大而导致的设计变更。研究成果为同类工程遇到同样情况时提供了一定的参考和借鉴。

Abstract

There is a significant discrepancy between the actual and designed unit consumption in curtain grouting construction for water conservancy and hydropower projects, with an observable trend of increasing consumption. The causes of this increase are multifaceted, complex, and variable, primarily influenced by grouting materials, human factors, grouting pressure, and the lithology of the formation being irrigated. However, effective measures can be implemented to control this issue. Over the years, during the revision process of relevant specifications, emphasis has been placed on addressing this concern. Each revision has progressively refined parameters affecting unit consumption, aligning them more closely with actual engineering practices and enhancing operability and implementation. The factors contributing to the significant difference in unit consumption are influencing its increase in curtain grouting. By employing effective control measures and treatment strategies, the designed unit consumption can be made consistent with the actual construction unit consumption, thereby preventing design changes due to increased material costs. The research findings provide valuable reference for similar projects encountering comparable situations.

关键词

帷幕灌浆 / 单耗量 / 设计 / 施工 / 差别 / 原因 / 处理措施

Key words

curtain grouting / unit consumptionc / design / construction / difference / reason / treatment measure

Author summay

吕晓东(1981—), 高级工程师, 硕士, 主要从事水利水电工程地质勘查工作。E-mail: [e-mail]